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Everything about Spectral resolution

Resolving power of a spectrograph

The spectral resolution of a spectrograph, or, more generally, of a frequency spectrum, is a measure of its ability to resolve features in the electromagnetic spectrum. It is usually denoted by, and is closely related to the resolving power of the spectrograph, defined as where is the smallest difference in wavelengths that can be distinguished at a wavelength of. For example, the Space Telescope Imaging Spectrograph (STIS) can distinguish features 0.17 nm apart at a wavelength of 1000 nm, giving it a resolution of 0.17 nm and a resolving power of about 5,900. An example of a high resolution spectrograph is the Cryogenic High-Resolution IR Echelle Spectrograph (CRIRES+) installed at ESO's Very Large Telescope, which has a spectral resolving power of up to 100,000. Wikipedia →

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  1. Read the overview: Spectral resolutionA 5-minute orientation
  2. Skim a recent paper: Spectral Response Function-Guided Deep Optimization-Driven Network for Spectral Super-ResolutionInfluential work since 2022
  3. Pick up a classic book: Landsat-4 science characterization early resultsThe most-reprinted book on the subject
  4. Read the landmark paper: High-Resolution X-Ray Photoemission Spectrum of the Valence Bands of GoldCited 6,116 times
  5. Go sideways: Optical spectrometerA closely related topic
  6. Go sideways: Resolution (mass spectrometry)A closely related topic

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